Results 1 - 10 of 1866
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[en] The published data on the synthesis, structures and properties of triorganyltelluronium salts are generalised and systematised. Special attention is given to the applications of these compounds in preparative organic synthesis.
[en] Data on the synthesis, reactions and structures of monoorganyl derivatives of tellurium(IV) (σ-telluranes) RTeX3 are systematised and generalised. The use of these compounds in preparative organic chemistry is considered. The bibliography includes 238 references.
[en] An extended cross beam method with optical signal detection was used to study inelastic collisions of mono-energetic electrons with molecular tellurium at energies up to 200 eV. It was found that both dissociative excitation of the Te2 molecule to atomic tellurium, and direct excitation of Σ-Σ band system of the Te2 molecule occur. 7 refs., 2 figs., 2 tabs
[en] Enthalpy increment measurements on La2Te3O9(s) and La2Te4O11(s) were carried out using a Calvet micro-calorimeter. The enthalpy values were analyzed using the non-linear curve fitting method. The dependence of enthalpy increments with temperature was given as: Ho(T) - Ho(298.15 K) (J mol-1) = 360.70T + 0.00409T 2 + 133.568 x 105/T - 149 923 (373 ≤ T (K) ≤ 936) for La2Te3O9 and Ho(T) - Ho(298.15 K) (J mol-1) = 331.927T + 0.0549T 2 + 29.3623 x 105/T - 114 587 (373 ≤ T (K) ≤ 936) for La2Te4O11
[en] This paper reports on a mat-like flexible thermoelectric system (FTES) based on rigid inorganic bulk materials, i.e. Bi–Te compounds. Inorganic bulk materials exhibit higher thermoelectric performance and can create a larger temperature drop due to their considerable height compared with organics and printable inorganics, meaning the FTES can produce an impressive power output. We show that the FTES, wherein both a thermoelectric module and a heat sink are integrated, is flexible enough to be adapted to any irregularly shaped surface. In the FTES, p- and n-type legs composed of a thermoelectric module are placed inside holders, which are connected to one another using flexible wires. Powered by a portable battery, the FTES was used to refrigerate human skin. As a result, a temperature drop of approximately 4 K was experimentally demonstrated, which humans felt as ‘cold’ or ‘very cold’, based on analysis. This indicates the feasibility of using the proposed FTES to control the temperature of the human body, even when using a portable battery. This was also applied to body heat harvesting. The FTES generated approximately 88 µW of power, which is sufficient to operate most wearable and/or implantable sensors. Our analysis based on human thermoregulatory modeling indicates that both refrigeration and power generation capacity can be further enhanced by improving the thermal contact between the FTES and human skin. The FTES shows potential for wearable refrigeration and body heat harvesting. (paper)